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DE596755C - Process for the preparation of disazo dyes - Google Patents

Process for the preparation of disazo dyes

Info

Publication number
DE596755C
DE596755C DEI45831D DEI0045831D DE596755C DE 596755 C DE596755 C DE 596755C DE I45831 D DEI45831 D DE I45831D DE I0045831 D DEI0045831 D DE I0045831D DE 596755 C DE596755 C DE 596755C
Authority
DE
Germany
Prior art keywords
preparation
disazo dyes
pyrazolone
methyl
tetrazotized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEI45831D
Other languages
German (de)
Inventor
Dr Georg Niemann
Dr Wilhelm Scheurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE399543D priority Critical patent/BE399543A/xx
Priority to NL35302D priority patent/NL35302C/xx
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI45831D priority patent/DE596755C/en
Application granted granted Critical
Publication of DE596755C publication Critical patent/DE596755C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/08—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Coloring (AREA)

Description

Verfahren zur Herstellung von Disazofarbstoffen Es wurde, gefunden, daß man wertvolle Disazofarbstoffe erhalten kann, wenn man tetrazotiertes 4, 4'-Diamino-3, 3'-dimethoxydiphenyl mit Homologen des i-Phenyl-3-methyl-5-pyrazolons, z. B. mit i - (4'- Methylphenyl)- oder i - (2', 4'-Dimethylphenyl)-3-methyl-5-pyrazolon, kuppelt. Die erhaltenen Farbstoffe zeichnen sich durch leuchtende Nuancen aus und können als vollkommen vulkanisierecht angesprochen werden, während der Disozofarbstoff aus tetrazotiertem 4, 4'-Diamino-3, 3'-dimethoxydiphenyl und i-Pheny1-3-methyl-5-pyrazolon nicht vülkanisierecht ist.Process for the preparation of disazo dyes It has been found that valuable disazo dyes can be obtained if one tetrazotized 4, 4'-diamino-3, 3'-dimethoxydiphenyl with homologues of i-phenyl-3-methyl-5-pyrazolone, e.g. B. with i - (4'-methylphenyl) - or i - (2 ', 4'-dimethylphenyl) -3-methyl-5-pyrazolone, couples. The dyes obtained are characterized by bright nuances and can can be addressed as completely vulcanizing, while the disozo dye from tetrazotized 4,4'-diamino-3, 3'-dimethoxydiphenyl and i-pheny1-3-methyl-5-pyrazolone is not right to vulcanize.

Beispiel Man tetrazotiert 25 Gewichtsteile 4, 4'-Dia.mino-3, 3'-dimetboxydiphenyl in der üblichen Weise und gibt die erhaltene Lösung der Tetrazoverbindung zu einer wäßrig alkalischen Suspension von 4o Gewichtsteilen i-(1'-Methylphenyl)-3-methyl-5-pyrazolon,die überschüssiges Natriumbicarbonat enthält. Nach beendeter Kupplung wird aufgekocht, dann abfiltriert und salzfrei gewaschen. Der erhaltene leuchtend gelbrote Farbstoff ist in organischen Lösungsmitteln, z. B. Benzol, Alkohol, unlöslich und vulkanisierecht.Example 25 parts by weight of 4,4'-Dia.mino-3,3'-dimetboxydiphenyl are tetrazotized in the usual manner and are the obtained solution of the tetrazo compound to a aqueous alkaline suspension of 4o parts by weight of i- (1'-methylphenyl) -3-methyl-5-pyrazolone, the Contains excess sodium bicarbonate. After the coupling is complete, the mixture is boiled, then filtered off and washed free of salt. The bright yellow-red dye obtained is in organic solvents, e.g. B. benzene, alcohol, insoluble and vulcanizing.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Disazofarbstoffen, dadurch gekennzeichnet, daß man tetrazotiertes 4, 4'-Diamino-3, 3'-d-imethoxy diphenyl mit Homologen des i-Phenyl-3-methyl-5-pyrazolons kuppelt.PATENT CLAIM: Process for the production of disazo dyes, thereby characterized in that tetrazotized 4, 4'-diamino-3, 3'-d-imethoxy diphenyl with Coupling homologues of i-phenyl-3-methyl-5-pyrazolone.
DEI45831D 1932-11-23 1932-11-23 Process for the preparation of disazo dyes Expired DE596755C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE399543D BE399543A (en) 1932-11-23
NL35302D NL35302C (en) 1932-11-23
DEI45831D DE596755C (en) 1932-11-23 1932-11-23 Process for the preparation of disazo dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI45831D DE596755C (en) 1932-11-23 1932-11-23 Process for the preparation of disazo dyes

Publications (1)

Publication Number Publication Date
DE596755C true DE596755C (en) 1934-05-09

Family

ID=7191611

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI45831D Expired DE596755C (en) 1932-11-23 1932-11-23 Process for the preparation of disazo dyes

Country Status (3)

Country Link
BE (1) BE399543A (en)
DE (1) DE596755C (en)
NL (1) NL35302C (en)

Also Published As

Publication number Publication date
BE399543A (en)
NL35302C (en)

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